<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			.box{
				width: 100px;height: 100px;
			}
			.red{
				background-color: red;
			}
			.fxb{
				background-color: green;
				
			}
			.black{
				background-color: black;
			}
			.pink{
				background-color: pink;
			}
			.six{
				background-color: gray;
			}
			.f{
				font-size: 30px;
			}
		</style>
	</head>
	<body>
		<!--多个类名用空格隔开-->
		<div class="box red f">1</div>
		<div class="box fxb f">2</div>
		<div class="box red f">3</div>
		<div class="box black">4</div>
		<div class="box pink">5</div>
		<div class="six">6</div>
	</body>
	
	
	
	
	
	
	1.6个div
	2.前5个div宽高为200px,背景颜色任意;
	3.第六个div宽高为300px，背景黑色(black)；
	4.第135个div字体大小为40px 字体颜色为金色(gold)
	5.第246个div字体加粗（font-weight: bold;）;
	
	
	
	
	
	
</html>
